CN102355619A - Electrostatic flat panel speaker - Google Patents
Electrostatic flat panel speaker Download PDFInfo
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- CN102355619A CN102355619A CN2011102321111A CN201110232111A CN102355619A CN 102355619 A CN102355619 A CN 102355619A CN 2011102321111 A CN2011102321111 A CN 2011102321111A CN 201110232111 A CN201110232111 A CN 201110232111A CN 102355619 A CN102355619 A CN 102355619A
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- pole plate
- subwindow
- plate
- vibrating diaphragm
- window
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R19/00—Electrostatic transducers
- H04R19/02—Loudspeakers
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- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Acoustics & Sound (AREA)
- Signal Processing (AREA)
- Electrostatic, Electromagnetic, Magneto- Strictive, And Variable-Resistance Transducers (AREA)
- Audible-Bandwidth Dynamoelectric Transducers Other Than Pickups (AREA)
Abstract
The invention discloses an electrostatic flat panel speaker, which comprises a front pole plate (a1), a rear pole plate (a2) and a diaphragm (a3) positioned between the front and rear pole plates (a1 and a2). The pole plate is an integrated pole plate consisting of an array plate which is formed by staggering a plurality of child windows (2) and grids (3) and enclosed by an outer frame (1). A conductive layer and one or more insulating layers covering the conductive layer are covered on the face, facing the diaphragm (3), of the pole plate; or the material of the pole plate is a conductive layer on which the insulated layer is covered; mirror symmetry is formed between all child windows (2) on the front pole plate (a1) and corresponding child windows (2) on the rear pole plate (a2), namely the child windows (2) on the front and rear pole plates (a1 and a2) are aligned correspondingly on the faces of the diaphragm (4); the diaphragm (4) is required to be fixed on the outer frame (1) of one pole plate; and the child windows (2), at corresponding positions on the two faces of the diaphragm (4), of the front and rear pole plates (a1 and a2) have correspondingly consistent shapes.
Description
Technical field
The present invention relates to the design and the manufacturing of electroacoustic apparatus, especially a kind of design and manufacturing of high-fidelity high sensitivity electrostatic loudspeaker.
Background technology
Static Yang Sheng device is a kind of electroacoustic component that can produce the high quality audio playback.Its sound generating mechanism is by two parallel pole plates, and apply one deck parallel in the centre of pole plate generally is the polarizable vibrating diaphragm that is made up of polymeric material.When on two pole plates, applying peak-to-peak value and be the audio voltage of thousands of volts, the alternation electrostatic field force that this audio voltage forms will promote the vibrating diaphragm vibration sounding through polarization, the conversion of completion electroacoustic.Because of the quality of vibrating diaphragm is extremely light, be equal to the quality of the air layer of several millimeters thickness generally speaking, electrostatic loudspeaker can be with minimum distortion reproducing audio signal.The ability of its true reproduction audio signal is that dynamic speaker is incomparable.
A desirable electrostatic loudspeaker is wanted between two pole plates, to generate enough strong electrostatic field and is produced enough thrust and amplitude by vibrating diaphragm and promote as much as possible air flow amount to improve intensity of phonation, and this area that just requires pole plate to conduct electricity is tried one's best greatly.The air that promotes when pole plate can let the vibrating diaphragm vibration again simultaneously passes through to strengthen the entrant sound property of pole plate with the little resistance of trying one's best, and this requires pole plate that bigger aperture opening ratio and less acoustic resistance are arranged.Therefore the pole plate of electrostatic loudspeaker generally is that cloth constitutes (like Martin Logan through the insulation way by dashing the metallic plate that tiny circular hole or honeycomb hole are arranged; Final Sound; Etc), or the epoxy fabricbase copper clad plate of band fine mesh add (like the QUAD) that insulating barrier constitutes.
Summary of the invention
Technical problem:The maximum scarce limit of existing technology is to produce high-quality voice reproducing with desirable loudness, thereby need reach practical sound pressure level through bigger pole plate area by the audio playback system that electrostatic loudspeaker constitutes.This has increased the difficulty of making, and makes the holding at high price of electrostatic loudspeaker, and also makes the bulky of electrostatic loudspeaker, has limited its application.
Technical scheme:The invention provides a kind of pole plate based on subwindow array principle design.The characteristic that this invention has utilized electrostatic field to strengthen at the edge of conductor is kept with the enhancer window and is applied to the average static field intensity on the vibrating diaphragm; Through adopting rate of air circulation that the subwindow array increases the vibrating diaphragm both sides reducing the resistance that vibrating diaphragm promotes air, thereby make vibrating diaphragm under the effect of identical electrostatic force, to promote the more air amount and improve intensity of phonation.And the pneumatic noise of the structure of trumpet type subwindow opening when having reduced the vibrating diaphragm sounding more.
Plate electrostatic loud speaker of the present invention comprises preceding pole plate, back pole plate and the vibrating diaphragm between preceding pole plate, back pole plate; This pole plate is by the integrated pole plate of being made up of the alternate array board that forms with grizzly bar of experimental process window that has that outside framework surrounds; Be coated with by the insulating barrier on one deck conductive layer and one or more layers covering conductive layer in the one side of this pad-face to vibrating diaphragm; Or plate material is that electric conducting material constitutes, covering insulating barrier it on; The high direct voltage that electrostatic generator HV module is used to produce the 3-5 kilovolt polarizes to vibrating diaphragm; The audio power signal of audio-frequency power amplifier output boosts to peak-to-peak value is before the ac high-voltage of thousands of volts is applied on pole plate and the back pole plate through the audio frequency step-up transformer, thereby type becomes the electrostatic field of an alternation between two pole plates; Receive promotion and the vibration sounding of the electrostatic field force of this alternation through the vibrating diaphragm of hyperpolarization, the vibration sound wave through the subwindow on the pole plate of front and back forwards, backwards direction propagate, realize the vocal function of static Yang Sheng device;
Before corresponding subwindow mirror image symmetry on all subwindow and the back pole plate on the pole plate, promptly before and after subwindow on the pole plate align each other on the two sides of vibrating diaphragm; On the outside framework of the pole plate that vibrating diaphragm need be fixed therein; Corresponding consistent in preceding pole plate, back pad-face corresponding locational subwindow shape on a two-plate of vibrating diaphragm; But this subwindow forward be that outside horn opening mode is the same or different backward, come doing different settings with the directive property of emitting sound wave backward forward.
Pole plate is polygon, circle or other irregular or asymmetric shapes with the planar profile of back pole plate before described.
Each subwindow of the preceding pole plate of this electrostatic loudspeaker, back pole plate promptly is provided with on the one side of conductive layer in the one side towards vibrating diaphragm, and growing to of subwindow opening be more than the twice of its opening the widest part less, i.e. the basic model shape of subwindow strip always.The opening shape of each subwindow comprises: rectangle that parallel each other two groups of straight lines constitute or the strip window that constitutes by several camber lines, or the strip window is that C shape, S shape or other are irregular curved.
The opening depth H of each subwindow promptly should place's pole plate thickness greater than 2 millimeters, and be provided with the twice of the widest part width of the one side upper shed of conductive layer at pole plate less than this subwindow.
Described each subwindow is provided with the Breadth Maximum W of one side upper shed of conductive layer greater than 2 millimeters, less than 12 millimeters at pole plate.
Each subwindow size on the said pole plate is to wait the strip of width; Or do not wait the strip of width, for the strip window that does not wait width, be provided with at pole plate on the one side of conductive layer; Be that one of a head breadth is narrow, or narrow centre, two is wide or the form of two head breadth intermediate narrower.
In preceding pole plate, back pole plate, between per two adjacent subwindows, be the grizzly bar that constitutes by plate material; In the one side of grizzly bar towards vibrating diaphragm, except that the peripheral frame of whole pole plate, be at grade, non-is plane, curved surface, V-type, U type groove or height table top towards the vibrating diaphragm face.
The preceding pole plate of the electrostatic loudspeaker that constitutes, back pole plate; Outside the part except that the peripheral frame of whole pole plate; All subwindows are in the summation of the area addition of all subwindows on the one side of vibrating diaphragm; Greater than 25% of the gross area except that peripheral framework of pole plate, less than 80% of the gross area except that peripheral framework of pole plate.
Width concerns 3X (L1+L2) < L less than the length of window of normal width 50 percent part and window length overall.
Beneficial effect:The electrostatic loudspeaker that employing is made up of the pole plate of subwindow array approach, with respect to the pole plate of common pore structure, the intensity of phonation of its unit vibrating diaphragm area improves greatly, and air communication is crossed the pneumatic noise that the subwindow type becomes and is reduced greatly.The subwindow array can be arranged by linear mode, also can arrange to form specific appearance more attractive in appearance with the aesthetic features that strengthens product or meet other functional requirements by specific symmetry or asymmetrical mode.The electrostatic loudspeaker that constitutes like this can obtain higher intensity of phonation with less size, the sound articulation of its playback also because of pneumatic noise reduce improve with the reduction of vibrating diaphragm additional drag.
Description of drawings
Fig. 1 is a general structure sketch map of the present invention.Wherein have: pole plate a2, vibrating diaphragm a3, high pressure generator HV module a4, audio frequency step-up transformer a5, audio-frequency power amplifier a6 behind the preceding pole plate a1 of electrostatic loudspeaker, the electrostatic loudspeaker;
Before Fig. 2 is the described static Yang Sheng of claim 1 of the present invention device, the sectional schematic diagram after the back pole plate assembling;
Fig. 3 is the sketch map of the described pole plate housing of claim 2 of the present invention type shape when being the rectangle situation;
Fig. 4 is the sketch map of the described pole plate housing of claim 2 of the present invention type shape when being the special-shaped situation of pentagon;
Fig. 5 is the sketch map of the described pole plate housing of claim 2 of the present invention type shape when being oval special-shaped situation;
Fig. 6 is the sketch map of the described pole plate housing of claim 2 of the present invention type shape when being the special-shaped situation of trapezium;
Fig. 7 is the sketch map of the described pole plate subwindow of claim 3 of the present invention type shape can be for rectangle the time;
Fig. 8 is the sketch map of the described pole plate subwindow of claim 3 of the present invention type shape can be for irregular strip the time;
Fig. 9 is the sketch map of the described pole plate subwindow of claim 3 of the present invention type shape can be for C shape the time;
Figure 10 is the sketch map of the described pole plate subwindow of claim 3 of the present invention type shape can be for S shape the time;
Figure 11 is the sketch map of the described pole plate subwindow of claim 3 of the present invention type shape can be for irregular trisquare shape the time;
Figure 12 is the A/F of claim 4 of the present invention and 5 described pole plate subwindows, the sketch map of the relation of the window degree of depth and subwindow and vibrating diaphragm position;
Figure 13 be the described pole plate subwindow of claim 6 of the present invention opening at one end or the sketch map of two ends can be not wide situation the time;
Figure 14 is that the opening of the described pole plate subwindow of claim 7 of the present invention is the sketch map when being parallel open from inside to outside;
Figure 15 is that the opening of the described pole plate subwindow of claim 7 of the present invention is the sketch map when being trapezoid-shaped openings from inside to outside;
Figure 16 is that the opening of the described pole plate subwindow of claim 7 of the present invention is the sketch map when being the involute curve opening from inside to outside;
Figure 17 be the opening of the described pole plate subwindow of claim 7 of the present invention for from inside to outside for parallel open, subwindow grizzly bar at interval is the sketch map of V-type groove;
Figure 18 be the opening of the described pole plate subwindow of claim 7 of the present invention for from inside to outside for parallel open, subwindow grizzly bar at interval can be the sketch map of ladder type boss;
Figure 19 be the opening of the described pole plate subwindow of claim 7 of the present invention for from inside to outside for parallel open, subwindow grizzly bar at interval can be the sketch map of T type boss;
Have among the above figure: preceding pole plate a1; Back pole plate a2; Vibrating diaphragm a3; High pressure generator HV module a4; Audio frequency step-up transformer a5; Audio-frequency power amplifier a6; Outside framework 1; Subwindow 2; Grizzly bar 3; Vibrating diaphragm 4; Rectangle pole plate 5; Pentagon pole plate 6; Oval pole plate 7; Trapezium pole plate 8; The long limit 9 of oblong openings; Oblong openings broadside 10; Rectangle window 11; Strip window 12; C shape window 13; S shape window 14; Irregular trisquare shape window 15; Pole plate subwindow width 16; The pole plate subwindow degree of depth 17; Termination 18; The opening length 19 of pole plate subwindow; Parallel open 20; Trapezoid-shaped openings 21; Involute curve opening 22; V-type channel opening 23; Ladder type boss openings 24; T type boss openings 25.
Embodiment
The electrostatic loudspeaker of the present invention's structure consists of the following components:
1, pole plate a2 behind pole plate a1, the electrostatic loudspeaker before the electrostatic loudspeaker: this pole plate is made up of by the sheet frame that contains subwindow of the present invention's design plastics or other insulation, non-insulating material.Like material is to be made up of nonisulated body, and the insulating barrier that the surface need degree of being coated with one deck ability 3-5 kilovolt need be connected with an end of step-up transformer through binding post at the edge of pole plate.Like plate material is to be made up of insulator, needs coating one deck conductive layer at pole plate towards the one side of vibrating diaphragm a3, adds the insulating barrier of one deck ability 3-5 kilovolt on the conductive layer again, and the conductive layer of coating need be connected with an end of step-up transformer through binding post.
2, the vibrating diaphragm a3 of polarization: this vibrating diaphragm top layer needs to handle to form the surface of high impedance through polarization.This vibrating diaphragm drawn is tightened on the housing of back with sticker pole plate a1 before the electrostatic loudspeaker.Again with another piece pole plate towards the one side of vibrating diaphragm towards the vibrating diaphragm parallel aligned, be fixed into an integral body.After being assembled into a complete phonation board, two pole plates vibrating diaphragm parallel be fixed in the middle of, and guarantee that the zone line of vibrating diaphragm and two pole plates has equally spaced air gap.This air gap can not run into the pole plate on both sides by vibrating diaphragm when normal sounding vibrates.The vibrating diaphragm of this polarization also need connect with the output of high pressure generator HV module a4 through binding post, to vibrating diaphragm polarizing voltage is provided.
3, high pressure generator HV module a4: the high direct voltage voltage that high pressure generator can produce by designing requirement is that vibrating diaphragm provides polarizing voltage.
4, audio frequency step-up transformer a5: the audio frequency step-up transformer can be elevated to audio frequency (music) signal of audio-frequency power amplifier a6 output the alternating voltage signal of several kilovolts peak-to-peak value from tens volts peak-to-peak value alternating signal.This high-voltage alternating voltage signal is applied to respectively behind pole plate a1 before the electrostatic loudspeaker, the electrostatic loudspeaker on the pole plate a2.
When static Yang Sheng device is worked; The high-voltage alternating voltage signal of audio frequency step-up transformer a5 output is applied to behind pole plate a1 before the electrostatic loudspeaker, the electrostatic loudspeaker on the pole plate a2, can in the air gap between two pole plates, produce the alternation electrostatic field with the music signal variation.The vibrating diaphragm through polarization that is clipped in this air gap receives to vibrate by the variation of electrostatic field force in the air gap of impetus between two pole plates of electrostatic force, promotes motion and the sounding of air.The final conversion of accomplishing electroacoustic.
Concrete structure is:
This electrostatic loudspeaker comprises preceding pole plate a1, back pole plate a2 and the vibrating diaphragm a3 between preceding pole plate a1, back pole plate a2; This pole plate is by the integrated pole plate of being made up of experimental process window 2 and the grizzly bar 3 alternate array boards that form that has that outside framework 1 surrounds; Be coated with by the insulating barrier on one deck conductive layer and one or more layers covering conductive layer in the one side of this pad-face to vibrating diaphragm 3; Or plate material is that electric conducting material constitutes, covering insulating barrier it on;
It is symmetrical that subwindow 2 that preceding pole plate a1 is upward all and back pole plate a2 go up corresponding subwindow 2 mirror images, and the subwindow 2 on promptly preceding pole plate a1 and the back pole plate a2 aligns on the two sides of vibrating diaphragm 4 each other; On the outside framework 1 of the pole plate that vibrating diaphragm 4 need be fixed therein; Corresponding locational subwindow 2 shapes are corresponding consistent on the two sides of vibrating diaphragm 4 with back pole plate a2 for preceding pole plate a1; But this subwindow 2 forward be that outside horn opening mode can be the same or different backward, come doing different settings with the directive property of emitting sound wave backward forward.
Pole plate a1 is polygon, circle or other irregular or asymmetric shapes with the planar profile of back pole plate a2 before described; As can be rectangle pole plate 5, pentagon pole plate 6, ellipse pole plate 7, trapezium pole plate 8.
Each subwindow on the preceding pole plate a1 of this electrostatic loudspeaker, the back pole plate a2 promptly is provided with on the one side of conductive layer in the one side towards vibrating diaphragm a3; The long limit 9 of the oblong openings of subwindow 2 openings is more than the twice of oblong openings broadside 10 at least, i.e. the basic model shape of subwindow 2 strip always; The opening shape of each subwindow 2 can be: rectangle window 11 that two groups of parallel each other straight lines constitute or the strip window 12 that constitutes by several camber lines, or the strip window is C shape window 13, S shape window 14 or other irregular trisquare shape windows 15.
Thickness that the degree of depth 17 of each pole plate subwindow 2 promptly should place's pole plate on the pole plate is greater than 2 millimeters, and is provided with the twice of pole plate subwindow width 16W of the widest part of the one side upper shed of conductive layer at pole plate less than this subwindow.
Described each subwindow 2 is provided with the maximum pole plate subwindow width 16W of one side upper shed of conductive layer greater than 2 millimeters, less than 12 millimeters at pole plate.The size of each subwindow 2 on the said pole plate is to wait the strip of width; Or do not wait the strip of width; For the strip window that does not wait width; Be provided with at pole plate on the one side of conductive layer, the part that termination 18 director's degree are respectively L1 and/or L2 is this window width smaller or equal to 50 percent the part of middle the widest part, and the total length L 1+L2 that termination 18 is shared and the opening length 19 of pole plate subwindow are that the relation of L must satisfy: 3 * (L1+L2) < L.
In preceding pole plate a1, back pole plate a2, between per two adjacent subwindows 2, be the grizzly bar 3 that constitutes by plate material; In the one side of grizzly bar 3 towards vibrating diaphragm 4, except that the outside framework 1 of whole pole plate, be at grade, non-grizzly bar 3 export-oriented faces towards the vibrating diaphragm face can be to be made up of plane, inclined-plane, curved surface, V-type or U type groove or height table top; Be that the outside opening of subwindow can be a parallel open 20, trapezoid-shaped openings 21, involute curve opening 22, V-type channel opening 23, ladder type boss openings 24, T type boss openings 25.On the preceding pole plate a1 of the electrostatic loudspeaker that constitutes and the back pole plate a2; Part except that the outside framework 1 of whole pole plate; Summation in the window area addition of all subwindows 2 on the one side of vibrating diaphragm 4; Greater than 25% of the gross area except that outside framework 1 of pole plate, less than 80% of the gross area except that outside framework 1 of pole plate.
Claims (8)
1. a plate electrostatic loud speaker is characterized in that this electrostatic loudspeaker comprises preceding pole plate (a1), back pole plate (a2) and is positioned at the vibrating diaphragm (a3) between preceding pole plate (a1), the back pole plate (a2); This pole plate is by the integrated pole plate of being made up of the alternate array board that forms with grizzly bar (3) of experimental process window (2) that has that outside framework (1) surrounds; Be coated with by the insulating barrier on one deck conductive layer and one or more layers covering conductive layer in the one side of this pad-face to vibrating diaphragm (3); Or plate material is that electric conducting material constitutes, covering insulating barrier it on;
Upward corresponding subwindow (2) mirror image is symmetrical with back pole plate (a2) for the upward all subwindows (2) of preceding pole plate (a1), and the subwindow (2) on promptly preceding pole plate (a1) and the back pole plate (a2) aligns on the two sides of vibrating diaphragm (4) each other; On the outside framework (1) of the pole plate that vibrating diaphragm (4) need be fixed therein; Preceding pole plate (a1) is corresponding consistent in the corresponding locational subwindow in the two sides of vibrating diaphragm (4) (2) shape with back pole plate (a2); But this subwindow (2) forward be that outside horn opening mode can be the same or different backward, come doing different settings with the directive property of emitting sound wave backward forward.
2. plate electrostatic loud speaker according to claim 1 is characterized in that: the planar profile of pole plate (a1) and back pole plate (a2) is polygon, circle or other irregular or asymmetric shapes before described; As can be rectangle pole plate (5), pentagon pole plate (6), ellipse pole plate (7), trapezium pole plate (8).
3. plate electrostatic loud speaker according to claim 1; It is characterized in that the preceding pole plate (a1) of this electrostatic loudspeaker, each subwindow on the back pole plate (a2) promptly are provided with on the one side of conductive layer in the one side towards vibrating diaphragm (a3); The long limit of the oblong openings of subwindow (2) opening (9) is more than the twice of oblong openings broadside (10) at least, i.e. the basic model shape of subwindow (2) strip always; The opening shape of each subwindow (2) can be: rectangle window (11) that two groups of parallel each other straight lines constitute or the strip window (12) that constitutes by several camber lines, or the strip window is C shape window (13), S shape window (14) or other irregular trisquare shape windows (15).
4. plate electrostatic loud speaker according to claim 1; The degree of depth (17) i.e. that it is characterized in that each pole plate subwindow (2) on the pole plate thickness of this place's pole plate and is provided with the twice of pole plate subwindow width (16) W of the widest part of the one side upper shed of conductive layer greater than 2 millimeters at pole plate less than this subwindow.
5. plate electrostatic loud speaker according to claim 3 is characterized in that described each subwindow (2) is provided with conductive layer at pole plate maximum pole plate subwindow width (16) W of one side upper shed is greater than 2 millimeters, less than 12 millimeters.
6. plate electrostatic loud speaker according to claim 3; The size that it is characterized in that each subwindow (2) on the said pole plate is to wait the strip of width; Or do not wait the strip of width; For the strip window that does not wait width; Be provided with at pole plate on the one side of conductive layer, the part that termination (18) director's degree is respectively L1 and/or L2 is this window width smaller or equal to 50 percent the part of middle the widest part, and the opening length (19) of total length L 1+L2 that termination (18) are shared and pole plate subwindow is that the relation of L must satisfy:
3×（L1+L2)<L。
7. plate electrostatic loud speaker according to claim 3 is characterized in that in preceding pole plate (a1), back pole plate (a2), between per two adjacent subwindows (2), being the grizzly bar (3) that is made up of plate material; In the one side of grizzly bar (3) towards vibrating diaphragm (4); Except that the outside framework (1) of whole pole plate; Be at grade, the export-oriented face of non-grizzly bar towards the vibrating diaphragm face (3) can be to be made up of plane (20), inclined-plane (21), curved surface (22), V-type or U type groove (23) or height table top (24) or (25); Be that the outside opening of subwindow can be parallel open (20), trapezoid-shaped openings (21), involute curve opening (22), V-type channel opening (23), ladder type boss openings (24), T type boss openings (25).
8. plate electrostatic loud speaker according to claim 7; It is characterized in that: on the preceding pole plate (a1) of the electrostatic loudspeaker of formation and the back pole plate (a2); Part except that the outside framework (1) of whole pole plate; In the summation of the window area addition of all subwindows (2) on the one side of vibrating diaphragm (4), greater than 25% of the gross area except that outside framework (1) of pole plate, less than 80% of the gross area except that outside framework (1) of pole plate.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011102321111A CN102355619A (en) | 2011-08-15 | 2011-08-15 | Electrostatic flat panel speaker |
| PCT/CN2012/080081 WO2013023574A1 (en) | 2011-08-15 | 2012-08-14 | Flat electrostatic loudspeaker |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011102321111A CN102355619A (en) | 2011-08-15 | 2011-08-15 | Electrostatic flat panel speaker |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102355619A true CN102355619A (en) | 2012-02-15 |
Family
ID=45579102
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011102321111A Pending CN102355619A (en) | 2011-08-15 | 2011-08-15 | Electrostatic flat panel speaker |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN102355619A (en) |
| WO (1) | WO2013023574A1 (en) |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2013023574A1 (en) * | 2011-08-15 | 2013-02-21 | Downes Brian | Flat electrostatic loudspeaker |
| CN103607689A (en) * | 2013-11-29 | 2014-02-26 | 上海集成电路研发中心有限公司 | Capacitive silicon microphone electrode flatness assessment structure and preparing method thereof |
| CN105681989A (en) * | 2016-02-26 | 2016-06-15 | 无锡吉仓纳米材料科技有限公司 | Composite diaphragm electrostatic loudspeaker of ultrathin graphite film and carbon tube film |
| CN106165449A (en) * | 2014-02-11 | 2016-11-23 | 沃威音响技术有限公司 | The electrostatic transducer improved |
| CN106211004A (en) * | 2016-08-29 | 2016-12-07 | 陈立康 | A kind of holographic three-dimensional electrostatic loudspeaker |
| CN106713558A (en) * | 2016-11-02 | 2017-05-24 | 上海传英信息技术有限公司 | Mobile-phone horn cavity device |
| CN109660925A (en) * | 2018-12-17 | 2019-04-19 | 海菲曼（天津）科技有限公司 | A kind of electroacoustic transducer and moving-coil electrostatic compound loudspeaker |
| US10349183B2 (en) | 2014-02-11 | 2019-07-09 | Warwick Acoustics Limited | Electrostatic transducer |
| US11825265B2 (en) | 2019-05-07 | 2023-11-21 | Warwick Acoustics Limited | Electrostatic transducer and diaphragm |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107040853B (en) * | 2017-04-17 | 2023-11-21 | 昆山海菲曼科技集团股份有限公司 | Speaker and earphone with same |
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|---|---|---|---|---|
| WO2013023574A1 (en) * | 2011-08-15 | 2013-02-21 | Downes Brian | Flat electrostatic loudspeaker |
| CN103607689A (en) * | 2013-11-29 | 2014-02-26 | 上海集成电路研发中心有限公司 | Capacitive silicon microphone electrode flatness assessment structure and preparing method thereof |
| CN103607689B (en) * | 2013-11-29 | 2018-11-09 | 上海集成电路研发中心有限公司 | Capacitive silicon microphone electrode flatness evaluation structure and preparation method thereof |
| CN106165449A (en) * | 2014-02-11 | 2016-11-23 | 沃威音响技术有限公司 | The electrostatic transducer improved |
| US10349183B2 (en) | 2014-02-11 | 2019-07-09 | Warwick Acoustics Limited | Electrostatic transducer |
| CN106165449B (en) * | 2014-02-11 | 2020-07-21 | 沃威音响有限公司 | Improved electrostatic transducer |
| US10785575B2 (en) | 2014-02-11 | 2020-09-22 | Warwick Acoustics Limited | Electrostatic transducer |
| CN105681989A (en) * | 2016-02-26 | 2016-06-15 | 无锡吉仓纳米材料科技有限公司 | Composite diaphragm electrostatic loudspeaker of ultrathin graphite film and carbon tube film |
| CN106211004A (en) * | 2016-08-29 | 2016-12-07 | 陈立康 | A kind of holographic three-dimensional electrostatic loudspeaker |
| CN106713558A (en) * | 2016-11-02 | 2017-05-24 | 上海传英信息技术有限公司 | Mobile-phone horn cavity device |
| CN109660925A (en) * | 2018-12-17 | 2019-04-19 | 海菲曼（天津）科技有限公司 | A kind of electroacoustic transducer and moving-coil electrostatic compound loudspeaker |
| CN109660925B (en) * | 2018-12-17 | 2020-08-25 | 海菲曼（天津）科技有限公司 | Electroacoustic transducer and moving coil static composite loudspeaker |
| US11825265B2 (en) | 2019-05-07 | 2023-11-21 | Warwick Acoustics Limited | Electrostatic transducer and diaphragm |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2013023574A1 (en) | 2013-02-21 |
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Application publication date: 20120215 |